MCQ
The compound which does not react with sodium metal is :
- A$CH _3 OH$
- B$CH _3 COOH$
- C$C _6 H _5 OH$
- ✓$CH _3- O - CH _3$
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$Cu(s) + 2Ag^+(aq) \to Cu^{2+}(aq) + 2Ag(s)$
$E^o = 0.46\,V$ at $298\,K$ is approximately
$Zn_{(s)} +Cu^{+2}_{(aq)} \to Zn^{2+}_{(aq)} +Cu_{(s)}$
$[E^o_{Cu^{+2 /Cu}} = 0.34\,V$ , $E^o_{Zn^{2+} /Zn} = -0.76\,V ]$
(Nearest integer)
[Use : Molal Freezing point depression constant of water $\left.=1.86 \,\mathrm{~K} \,\mathrm{~kg} \,\mathrm{~mol}^{-1}\right]$
Freezing Point of water $=273\, \mathrm{~K}$
Atomic masses : $\mathrm{C}: 12.0\, \mathrm{u}, \mathrm{O}: 16.0\, \mathrm{u}, \mathrm{H}: 1.0\, \mathrm{u}]$
Product $(A)$ and $(B)$ is differentiated by
Statement $I$ : The higher oxidation states are more stable down the group among transition elements unlike p-block elements.
Statement $II$ : Copper can not liberate hydrogen from weak acids.
In the light of the above statements, choose the correct answer from the options given below :
$A.$ $E _{\text {cell }}$ is an intensive parameter.
$B.$ A negative $E^{\Theta}$ means that the redox couple is a stronger reducing agent than the $H ^{+} / H _2$ couple.
$C.$ The amount of electricity required for oxidation or reduction depends on the stoichiometry of the electrode reaction.
$D.$ The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte.